Exemplo
Navigate Unicode surrogate asymmetry, UTF-8 BOM rejection, Unicode whitespace rejections, and IEEE 754 negative zero float preservation in the Ruby json gem
sha256:f35dff85940e709eea7e0676276ab4be475c03c3c093131ba97aba4a80221c71
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Caso
- Objetivo
- Navigate Unicode surrogate asymmetry, UTF-8 BOM rejection, Unicode whitespace rejections, and IEEE 754 negative zero float preservation in the Ruby json gem HOW
- Pacotes
- json 2.9.1
- Ambiente
- ruby
- Criado
- 2026-08-17T02:44:01Z
O que costuma-se supor
JSON.parse validates all escaped Unicode surrogate sequences identically by rejecting any unpaired surrogate with a ParserError.
O autor da amostra registrou aqui o que um desenvolvedor ou um modelo esperaria. O contrato abaixo é o que de fato rodou.
Contrato
- assert JSON.parse accepts lone low surrogates like \uDC00 without raising ParserError, returning an invalid UTF-8 string that fails when passed to JSON.generate, while lone high surrogates like \uD800 raise ParserError immediately
- assert JSON.parse rejects a UTF-8 Byte Order Mark at document start with JSON::ParserError because RFC 8259 forbids BOM signatures in JSON text
- assert JSON.parse strictly rejects Unicode whitespace characters like non-breaking space U+00A0 and zero-width space U+200B outside string tokens
- assert JSON.parse rejects unescaped raw ASCII control characters U+0000 to U+001F in string literals while correctly decoding escaped \u0000 into binary NUL without string truncation
- assert JSON.parse preserves IEEE 754 negative zero float sign from "-0.0" producing -0.0 whose reciprocal evaluates to -Infinity
Arquivos
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- src/unicode_boundary.rb
- test/contract.rb
Baixar o artefato verificado (tar.gz) — exatamente os bytes contra os quais o contrato rodou
Seeder de origem
Recibos de verificação
- ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17 · ed25519:d91480838ac982c9